US10841998B1 - Shared power topology for LED luminaires - Google Patents

Shared power topology for LED luminaires Download PDF

Info

Publication number
US10841998B1
US10841998B1 US16/414,963 US201916414963A US10841998B1 US 10841998 B1 US10841998 B1 US 10841998B1 US 201916414963 A US201916414963 A US 201916414963A US 10841998 B1 US10841998 B1 US 10841998B1
Authority
US
United States
Prior art keywords
led
string
electrically connected
driver
led string
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
US16/414,963
Other languages
English (en)
Other versions
US20200367330A1 (en
Inventor
Benjamin David VOLLMER
Isaac P. Dost
Walten Peter Owens
George Albert Dederich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Signify Holding BV
Original Assignee
Signify Holding BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Signify Holding BV filed Critical Signify Holding BV
Assigned to EATON INTELLIGENT POWER LIMITED reassignment EATON INTELLIGENT POWER LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DEDERICH, GEORGE ALBERT, DOST, ISAAC P., OWENS, WALTEN PETER, VOLLMER, BENJAMIN DAVID
Priority to US16/414,963 priority Critical patent/US10841998B1/en
Assigned to SIGNIFY HOLDING B.V. reassignment SIGNIFY HOLDING B.V. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EATON INTELLIGENT POWER LIMITED
Priority to EP20726122.3A priority patent/EP3970453B1/en
Priority to US17/609,688 priority patent/US11930572B2/en
Priority to CN202080036485.3A priority patent/CN113841466B/zh
Priority to PCT/EP2020/063697 priority patent/WO2020234183A1/en
Priority to JP2021568617A priority patent/JP7503078B2/ja
Publication of US10841998B1 publication Critical patent/US10841998B1/en
Application granted granted Critical
Publication of US20200367330A1 publication Critical patent/US20200367330A1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/52—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits in a parallel array of LEDs
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/48—Details of LED load circuits with an active control inside an LED matrix having LEDs organised in strings and incorporating parallel shunting devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines

Definitions

  • LED luminaires typically include an LED source or multiple sets of LEDs connected together. LEDs are typically designed to run on low voltage, such as 12-24V, direct current (DC) electricity. For this reason, LED luminaires will have one or more LED drivers. LED drivers, which are sometimes also referred to as LED power supplies, are circuits that convert power from a relatively higher line voltage (such as 120V or 220V) alternating current (AC) source into low voltage direct current. In addition to rectifying AC current to DC current, LED drivers protect LEDs from current and voltage fluctuations caused by variabilities in the power source. LED drivers may be integral with an LED luminaire, or they may be external to the luminaire and electrically connected between an external power supply and the LEDs.
  • DC direct current
  • multiple drivers are needed to provide power to multiple LED strings or sources.
  • failure of that driver causes a corresponding failure of the driver's associated LED source or string.
  • a system for emitting light includes a first light emitting diode (LED) string of one or more LEDs that are electrically connected in series, and also a first LED driver that is electrically connected in parallel to the first LED string.
  • the system also includes a first one-way conductor having an input that that is electrically connected to an output of the first LED driver, and an output that is electrically connected to an input of the first LED string.
  • the system also includes a second LED driver that is electrically connected in parallel to the first LED string.
  • the system also includes a second one-way conductor having an input that that is electrically connected to an output of the second LED driver, along with an output that is electrically connected to an input of the first LED string.
  • this system may include a second LED string of one or more LEDs that are electrically connected in series. If so, the second LED string will be electrically connected in parallel to each of the first LED string, the first LED driver, and the second LED driver.
  • a normally-open switch may be electrically connected between the inputs of the first LED string and the second LED string, The normally-open switch will be configured to: (i) when neither of the LED drivers is failing, open a first electrical connection between the first LED driver and the second LED string, and open a second electrical connection between the second LED driver and the first LED string; and (ii) when either the first or the second LED driver is failing, close the first and second electrical connections.
  • a system for emitting light in another embodiment, includes a first LED string of one or more LEDs that are electrically connected in series, a first LED driver that is electrically connected in parallel to the first LED string, and a first one-way conductor.
  • the first one-way conductor includes an input that that is electrically connected to an output of the first LED driver, and an output that is electrically connected to an input of the first LED string.
  • the system also includes a second LED string of one or more LEDs that are electrically connected in series, a second LED driver that is electrically connected in parallel to the second LED string, and a second one-way conductor.
  • the second one-way conductor includes an input that that is electrically connected to an output of the second LED driver, and an output that is electrically connected to an input of the second LED string.
  • a normally-open switch is electrically connected between the inputs of the first LED string and the second LED string. When neither of the LED drivers is failing, the normally-open switch will not electrically connect the first LED driver to the second LED string, nor will it electrically connect the second LED driver to the first LED string. When either the first or the second LED driver is failing, the normally-open switch will close and electrically connect the output of the first LED driver, the input of the first LED string, the output of the second LED driver and the input of the second LED string.
  • a system for emitting light includes: a first LED string of one or more LEDs that are electrically connected in series; a first LED driver that is electrically connected in parallel to the first LED string; and a first voltage sensor positioned to measure voltage in a conductive path between the first LED driver and the first LED string.
  • the system also includes: a second LED string of one or more LEDs that are electrically connected in series; a second LED driver that is electrically connected in parallel to the second LED string; and a second voltage sensor positioned to measure voltage in a conductive path between the first LED driver and the first LED string.
  • the system also includes a first normally open switch that is configured to close and positioned to create a conductive path between the first LED driver and the second LED string when the voltage measured by the first voltage sensor is more than a threshold level above the voltage measured by the second voltage sensor.
  • the system also includes a second normally open switch that is configured to close and positioned to create a conductive path between the second LED driver and the first LED string when the voltage measured by the second voltage sensor is more than a threshold level above the voltage measured by the first voltage sensor.
  • each of the normally open switches may include a field effect transistor.
  • each of the one-way conductors may include, for example, a field effect transistor or a diode.
  • the LED string(s) may be components of an LED luminaire.
  • the LED drivers also may be components of the LED luminaire, or the LED drivers may be positioned external to the LED luminaire.
  • a first current sensor may be positioned to detect current in a conductive path between the first LED driver and the first LED string
  • a second current sensor may be positioned to detect current in a conductive path between the second LED driver and the second LED string. If so, each of the current sensors may trigger closure of the normally-open switch upon detection of an undercurrent condition.
  • the system may include an optical sensor that is configured to measure brightness of light emitted by one or more of the LED strings.
  • the optical sensor may be configured to trigger closure of the normally-open switch upon detection that an LED string's brightness is lower than a threshold level.
  • the system may include a temperature sensor that is configured to measure temperature in a vicinity of one or more of the LED strings.
  • the temperature sensor may be configured to trigger closure of the normally-open switch upon detection that the temperature that is lower than a threshold level.
  • FIG. 1 illustrates an example LED luminaire such as may exist in the prior art.
  • FIGS. 2 and 3 illustrate common LED driver topologies as may exist in the prior art.
  • FIG. 4 illustrates a first embodiment of an LED driver topology according to the present disclosure.
  • FIGS. 5A and 5B illustrate a second embodiment of an LED driver topology according to the present disclosure.
  • FIG. 6 illustrates a third embodiment in which switching is triggered by a substantial difference in voltage in the two circuit sections.
  • Terminology that is relevant to this disclosure includes:
  • the terms “lighting device,” “light fixture,” “luminaire” and “illumination device” are used interchangeably to refer to a device that includes a source of optical radiation such as one or more light emitting diodes (LEDs), light bulbs, ultraviolet light or infrared sources, or other sources of optical radiation.
  • a lighting device will also include a housing, one or more electrical components for conveying power from a power supply to the device's optical radiation source, and optionally control circuitry.
  • An “LED luminaire” is a lighting device that includes LEDs as an optical radiation source.
  • the term “electrically connected” means, with respect to two or more components, that a conductive path exists between the components so that electric current can flow from one of the components to the other, either directly or through one or more intermediary components.
  • an example lighting device 101 such as that which may exist in the prior art may include an optical radiation source, such as any number of lighting modules that include LEDs.
  • lighting device 101 will include a number of LED modules 103 , 105 sufficient to provide a high intensity LED device.
  • the lighting device 101 may include a housing 107 that holds electrical components such as a fixture controller, a power source, and wiring and circuitry to supply power and/or control signals to the LED modules.
  • the lighting device 101 also may include communication components 108 such as a transceiver and antenna.
  • FIG. 2 illustrates a common topology for LED drivers of an LED luminaire as may exist in the prior art.
  • an LED string 201 includes any number of LEDs electrically connected to each other in series.
  • An LED driver 202 is electrically connected in parallel to the LED string 201 to provide power to the LED string 201 .
  • An example LED driver is disclosed in U.S. Pat. No. 7,075,252 (“LED Driver Circuit”), the disclosure of which is incorporated into this document by reference.
  • FIG. 3 illustrates that in the prior art, an LED luminaire (represented by box 305 ) may include multiple LED strings 301 , 311 , each of which is powered by its own independently associated LED driver 302 , 312 .
  • a problem with this topology is that when a driver 302 fails, all of the LEDs in its associated LED string 301 will lose power and will go dark.
  • LED drivers have a limited lifespan and eventually need to be replaced.
  • all LED luminaires that include the driver circuit topology shown in FIG. 3 will eventually require maintenance to replace LED drivers that have reached end-of-life.
  • FIG. 4 illustrates an example LED driver circuit topology that helps address the problems described above.
  • an LED string 401 is electrically connected to two or more LED drivers 402 , 412 .
  • the LED drivers may be of either the constant current type or the constant voltage type, although if the driver is of the constant voltage type it may have additional circuitry that causes it to have a constant current.
  • the brightness of the LEDs is controlled by an external controller 409 that includes a processor and an output that directs a signal to each driver which causes the amplitude of the current to vary, or that causes the brightness of the emitted light to dim due to pulse width modulation.
  • Each LED driver will generate an output current that is responsive to the signal of the controller.
  • the brightness of the LEDs in the LED string 401 will vary with amplitude of the output current.
  • the LED drivers 402 , 412 are electrically connected to the LED string 401 in parallel so that if one of the LED drivers (such as 402 ) fails, the other LED driver (in this example, 412 ) may still provide power to the LED string 401 . Thus, in the absence of a failure both drivers 402 , 412 will drive the LED string 401 . However, if one of the drivers 402 or 412 fails, the total current delivered to the LED string 401 will be reduced, and the effective brightness of light emitted by the LED string 401 also will therefore be reduced. However, all LEDs in the LED string 401 will still operate.
  • each LED driver 402 , 412 may be electrically connected to a one-way conductor 403 , 413 such as a field effect transistor (FET) or diode (such as a Schottky diode) that only permits current to flow in a single direction from the driver to the LED string, and not in the reverse direction. If one of the drivers should fail, the driver's associated one-way conductor 403 , 413 will prevent total system failure by ensuring that current from the still-active driver is directed to the LEDs of the LED string 401 rather than to the failed driver.
  • FET field effect transistor
  • diode such as a Schottky diode
  • the embodiments described above are not limited to topologies with two LED drivers. Any number of two or more drivers may be available in parallel to drive the LED string 401 in the embodiment of FIG. 4 .
  • FIGS. 5A and 5B illustrate an alternate embodiment in which two or more LED drivers 502 , 512 are collectively associated with two or more LED strings 501 , 511 , each in a parallel electrical connection.
  • FIG. 5A illustrates that during normal operation a first LED driver 502 will provide power to the first LED string 501 , while the second LED driver 512 will provide power to the second LED string 511 .
  • a switch 517 will be electrically positioned between the power inputs of the first LED string 501 and the second LED string 511 , and the switch 517 is a normally open switch that will be open during normal operation of the circuit (that is, when none of the drivers has failed), this electrically separating the LED string/driver pair 501 / 502 from the other LED string/driver pair 511 / 512 .
  • each LED driver 502 , 512 is electrically connected to a one-way conductor 503 , 513 such as a FET or diode (such as a Schottky diode) that only permits current to flow in a single direction from the driver to the LED string(s), and not in the reverse direction.
  • a one-way conductor 503 , 513 such as a FET or diode (such as a Schottky diode) that only permits current to flow in a single direction from the driver to the LED string(s), and not in the reverse direction.
  • the switch 517 will close and both LED strings 501 , 511 will be pulled in parallel and driven by the non-failing driver 512 .
  • the current of the non-failing driver 512 will be split between the two LED strings 501 , 511 , thus reducing the brightness of each string by approximately 40%, but each string will remain lit. Additional redundant drivers could be provided for one or more of the LED strings so that more of the brightness is maintained (i.e., there is less than a 40% brightness reduction) if one of the LED drivers should fail.
  • each section (LED driver/LED string pair) of the circuit, or another component in or near the luminaire may include a sensor 504 , 514 that can detect failure of an LED driver.
  • the sensor is current sensor, upon detection that current is no longer flowing from an LED driver or upon detection that an LED driver's output current is below a lower threshold, the sensor may trigger the switch 517 to close.
  • the sensors for each section may be voltage sensors, and the detection of at least a threshold difference in voltage between the two sensors may trigger the switch to close.
  • the senor may be a temperature sensor that detects the temperature of an LED string; if so, the temperature sensor may trigger closure of the switch 517 if the temperature sensor detects that an LED string's temperature has dropped below a threshold level.
  • the sensor may be an optical sensor that detects the brightness of light output by an LED string; if so, the optical sensor may trigger closure of the switch 517 if the optical sensor detects that an LED string's brightness (such as may be measured by lumens output) dropped below a threshold level.
  • Other types of sensors may be used in various embodiments. These thresholds may be moderated by a condition of whether the light is powered on at all, or the system may include a processor and programming instructions that cause the sensor only to trigger closure of the switch when a failure condition is detected and the luminaire is powered on for normal operation.
  • FIGS. 5A and 5B are not limited to topologies with two LED strings and two drivers. Any number of LED string/driver pairs may be connected in parallel, each separated from adjacent pairs by a normally-open switch. If so, then the sensor that is associated with each driver may trigger closure of the switch (or switches) that are adjacent to the failing LED driver's circuit.
  • the embodiments of FIGS. 4 and 5A-5B may be combined so that any LED string/driver pair in the topology of FIGS. 5A-5B may include multiple LED drivers that are electrically connected in parallel to a single LED string, thus providing an LED string/driver pair with redundant drivers that is also electrically connected to one or more additional LED string/driver pair via a normally-open switch.
  • FIG. 6 illustrates an embodiment in which the sensors 604 , 614 are voltage sensors. As noted above, in an embodiment such as this the detection of at least a threshold difference in voltage between the two sensors may trigger the switch to close. In this situation each of the FETs 603 and 613 will be a normally open switch.
  • the first FET 603 is normally open, If the voltage across the voltage sensor 604 of the first section (in this case, biasing resistors) is more than a threshold amount more than the voltage across the second section's voltage sensor 614 (biasing resistors), the first section's FET 603 will turn on to create a conductive path between the first LED driver 602 and the second LED string 612 so that power from the first LED driver 602 is directed not only to the first LED string 601 but also to the second LED string 611 .
  • the second section's normally open switch (such as FET 613 ) will turn on and create a conductive path between the second LED driver 612 and the first LED string 601 so that power from the second LED driver 612 is directed not only to the second LED string 611 but also to the first LED string 601 .
  • the variation of FIG. 6 may be combined with those of FIG. 4 or FIGS. 5A-5B by, for example, providing a parallel redundant driver with switch for either of the LED drivers 602 , 612 .
  • the embodiments described above may be installed and included in the circuitry of an individual luminaire.
  • some of the components, such as the buck driver and/or controller may be part of a control system that is external to the luminaire.
  • Examples of luminaires and control systems that the embodiments disclosed above may be used in include, for example, those described in U.S. Pat. No. 9,188,307, titled “High Intensity LED Illumination Device with Automated Sensor-Based Control”; U.S. Pat. No. 9,730,302, titled “System and Method for Control of Illumination Device”; and U.S. Pat. No. 9,800,431, titled “Controllers for Interconnected Lighting Devices”, the disclosures of which are all fully incorporated into this document by reference.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
US16/414,963 2019-05-17 2019-05-17 Shared power topology for LED luminaires Active US10841998B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US16/414,963 US10841998B1 (en) 2019-05-17 2019-05-17 Shared power topology for LED luminaires
JP2021568617A JP7503078B2 (ja) 2019-05-17 2020-05-15 Ｌｅｄ照明器具のための共有電源トポロジ
CN202080036485.3A CN113841466B (zh) 2019-05-17 2020-05-15 用于led照明器的共享功率拓扑
US17/609,688 US11930572B2 (en) 2019-05-17 2020-05-15 Shared power topology for LED luminaires
EP20726122.3A EP3970453B1 (en) 2019-05-17 2020-05-15 Shared power topology for led luminaires
PCT/EP2020/063697 WO2020234183A1 (en) 2019-05-17 2020-05-15 Shared power topology for led luminaires

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16/414,963 US10841998B1 (en) 2019-05-17 2019-05-17 Shared power topology for LED luminaires

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/609,688 Continuation US11930572B2 (en) 2019-05-17 2020-05-15 Shared power topology for LED luminaires

Publications (2)

Publication Number Publication Date
US10841998B1 true US10841998B1 (en) 2020-11-17
US20200367330A1 US20200367330A1 (en) 2020-11-19

Family

ID=70738581

Family Applications (2)

Application Number Title Priority Date Filing Date
US16/414,963 Active US10841998B1 (en) 2019-05-17 2019-05-17 Shared power topology for LED luminaires
US17/609,688 Active 2040-01-27 US11930572B2 (en) 2019-05-17 2020-05-15 Shared power topology for LED luminaires

Family Applications After (1)

Application Number Title Priority Date Filing Date
US17/609,688 Active 2040-01-27 US11930572B2 (en) 2019-05-17 2020-05-15 Shared power topology for LED luminaires

Country Status (5)

Country Link
US (2) US10841998B1 (cg-RX-API-DMAC7.html)
EP (1) EP3970453B1 (cg-RX-API-DMAC7.html)
JP (1) JP7503078B2 (cg-RX-API-DMAC7.html)
CN (1) CN113841466B (cg-RX-API-DMAC7.html)
WO (1) WO2020234183A1 (cg-RX-API-DMAC7.html)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220225484A1 (en) * 2019-05-17 2022-07-14 Signify Holding B.V. Shared power topology for led luminaires
US12108503B2 (en) 2022-12-20 2024-10-01 Electronic Theatre Controls, Inc. Independent lighting control
US12538406B2 (en) 2022-12-20 2026-01-27 Electronic Theatre Controls, Inc. Independent lighting control

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023012113A1 (en) 2021-08-03 2023-02-09 Signify Holding B.V. Redundant lighting driver system
CN114596821B (zh) * 2022-05-09 2022-08-16 惠科股份有限公司 控制电路、控制方法和显示装置

Citations (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7075252B1 (en) 2005-04-12 2006-07-11 Eaton Corporation LED driver circuit
US20100283322A1 (en) * 2009-05-06 2010-11-11 Polar Semiconductor, Inc. Multiple output power supply
US8174809B2 (en) * 2006-07-26 2012-05-08 Koninklijke Philips Electronics N.V. Arrangement and method for deactivating electrical elements when malfunctioning
US8193716B2 (en) * 2008-09-28 2012-06-05 Chia-Cheng Chang High-power LED driving circuit
US20120306387A1 (en) 2011-05-31 2012-12-06 Microsemi Corporation Led driver arrangement with multiple current mirrors
US8508143B2 (en) 2009-02-05 2013-08-13 Denso Corporation Light emitting diode driving circuit
US8674621B2 (en) 2009-10-01 2014-03-18 Inventronics (Hangzhou), Inc. Constant current control circuit with multiple outputs for LED driver
US20140169037A1 (en) * 2011-04-28 2014-06-19 Saint-Gobain Glass France Module comprising light-emitting diodes and luminous glazing with such a diode-comprising module
US20150173143A1 (en) * 2013-12-13 2015-06-18 Delta Electronics (Shanghai) Co., Ltd Light driving circuit
US9084327B2 (en) * 2012-04-12 2015-07-14 Richtek Technology Corporation Driver circuit for improving utilization rate of LED device and related constant current regulator
US9257067B2 (en) 2013-05-13 2016-02-09 Shenzhen China Star Optoelectronics Technology Co., Ltd Light source driving circuit of light emitting semiconductor and backlight module
US20160255687A1 (en) 2013-11-25 2016-09-01 Koninklijke Philips N.V. A method of controlling a lighting arrangement, a lighting controller and a lighting system
US9443478B2 (en) 2014-08-06 2016-09-13 Samsung Display Co., Ltd. Light source device, driving method thereof and display device having the same
US9655184B2 (en) * 2015-03-31 2017-05-16 Varroc Lighting Systems S.R.O. Arrangement and method for controlling a plurality of light-emitting diodes which are connected in series
US9660535B2 (en) 2011-11-11 2017-05-23 Microchip Technology Incorporated Method and system to dynamically position a switch mode power supply output voltage
US9717123B1 (en) 2016-10-17 2017-07-25 Integrated Silicon Solution, Inc. Audible noise reduction method for multiple LED channel systems
US20170245328A1 (en) 2007-11-30 2017-08-24 Nuwave, Llc Programmable Induction Cooking System and Method
US9875697B2 (en) 2011-08-30 2018-01-23 Magnachip Semiconductor, Ltd. Parallel constant current LED driving units for driving a LED string and method of performing the same
US9924574B1 (en) 2016-10-28 2018-03-20 Uledo Llc. Method and apparatus for controlling light output from a LED lamp
US9930747B2 (en) * 2016-04-11 2018-03-27 Cooper Technologies Company Fail-safe LED system
US20180338358A1 (en) 2017-05-17 2018-11-22 Eaton Intelligent Power Limited Led luminaire with constant current per-module control
US20180376555A1 (en) * 2017-06-27 2018-12-27 Wangs Alliance Corporation Methods and apparatus for controlling the current supplied to light emitting diodes
US10212770B2 (en) 2015-04-23 2019-02-19 Versitech Limited AC-DC single-inductor multiple-output LED drivers
US20190069381A1 (en) 2017-08-23 2019-02-28 Eaton Intelligent Power Limited Time-Based Lighting Control
US20200077477A1 (en) * 2017-03-14 2020-03-05 Lumileds Llc Led lighting circuit

Family Cites Families (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011143510A1 (en) * 2010-05-12 2011-11-17 Lynk Labs, Inc. Led lighting system
JP2005310571A (ja) * 2004-04-22 2005-11-04 Nec Saitama Ltd カメラ機能付き携帯型電子機器
US7520072B2 (en) 2007-05-09 2009-04-21 William Yu Exit signs with and without emergency lighting
US20080295371A1 (en) * 2007-05-30 2008-12-04 Georgiana Hsu Exit sign illuminated by color LEDs
WO2009064682A2 (en) * 2007-11-16 2009-05-22 Allegro Microsystems, Inc. Electronic circuits for driving series connected light emitting diode strings
KR100922336B1 (ko) * 2009-02-17 2009-10-21 서철식 Ｌｅｄ 조명 장치
CN102032521B (zh) 2009-09-24 2013-08-07 富准精密工业(深圳)有限公司 发光二极管灯具
CN102606966A (zh) * 2011-01-25 2012-07-25 西安翌阳新能源技术工程有限公司 一种led发光装置
JP6532677B2 (ja) * 2011-05-19 2019-06-19 シグニファイ ホールディング ビー ヴィ 光発生装置
SG189603A1 (en) * 2011-11-04 2013-05-31 Opulent Electronics Internat Pte Ltd System for driving a plurality of high powered led units
CN202647362U (zh) * 2012-04-20 2013-01-02 甄钊伟 一种彩色led灯饰
JP2013225449A (ja) * 2012-04-23 2013-10-31 Sharp Corp 照明装置
CN102802328B (zh) * 2012-09-05 2015-09-09 英飞特电子（杭州）股份有限公司 一种led光源的恒流驱动器及led灯具
ITPD20120410A1 (it) * 2012-12-27 2014-06-28 Automotive Lighting Italia Spa Circuito di pilotaggio di sorgenti luminose e fanale automobilistico provvisto di detto circuito di pilotaggio di sorgenti luminose
CN104075166B (zh) * 2013-03-26 2016-08-24 钰瀚科技股份有限公司 驱动数种颜色的发光二极管串的装置
CA2875014A1 (en) 2013-12-17 2015-06-17 Ephesus Lighting, Inc. Lens structure for high intensity led fixture
JP6238166B2 (ja) * 2013-12-20 2017-11-29 パナソニックＩｐマネジメント株式会社 発光ユニット及び照明装置
JP6332629B2 (ja) * 2014-09-11 2018-05-30 岩崎電気株式会社 Ｌｅｄ電源及びｌｅｄ照明装置
CN104869711A (zh) * 2015-05-15 2015-08-26 西交利物浦大学 一种谐振型大功率多路输出led驱动电源
CN105323923B (zh) 2015-10-27 2018-11-30 浙江生辉照明有限公司 Led智能控制电路及led照明装置
CN106922069B (zh) * 2015-12-25 2023-05-16 四川新力光源股份有限公司 一种防电源故障灯箱
WO2017117195A1 (en) 2015-12-28 2017-07-06 Ephesus Lighting, Inc. System and method for control of an illumination device
CN109076681B (zh) 2016-03-08 2020-04-17 伊顿智能动力有限公司 用于互连照明装置的控制器
JP6757579B2 (ja) * 2016-03-18 2020-09-23 ローム株式会社 発光素子駆動装置、発光装置、車両
WO2018069464A1 (de) * 2016-10-13 2018-04-19 Elmos Semiconductor Aktiengesellschaft Led-beleuchtungsvorrichtung, insbesondere für fahrzeuge
CN108811221B (zh) * 2017-04-26 2020-08-04 嘉兴海拉灯具有限公司 一种led驱动装置、驱动方法及led灯具
US10841998B1 (en) * 2019-05-17 2020-11-17 Signify Holding B.V. Shared power topology for LED luminaires
US11985175B2 (en) 2020-03-25 2024-05-14 Snap Inc. Virtual interaction session to facilitate time limited augmented reality based communication between multiple users

Patent Citations (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7075252B1 (en) 2005-04-12 2006-07-11 Eaton Corporation LED driver circuit
US8174809B2 (en) * 2006-07-26 2012-05-08 Koninklijke Philips Electronics N.V. Arrangement and method for deactivating electrical elements when malfunctioning
US20170245328A1 (en) 2007-11-30 2017-08-24 Nuwave, Llc Programmable Induction Cooking System and Method
US8193716B2 (en) * 2008-09-28 2012-06-05 Chia-Cheng Chang High-power LED driving circuit
US8508143B2 (en) 2009-02-05 2013-08-13 Denso Corporation Light emitting diode driving circuit
US20100283322A1 (en) * 2009-05-06 2010-11-11 Polar Semiconductor, Inc. Multiple output power supply
US8674621B2 (en) 2009-10-01 2014-03-18 Inventronics (Hangzhou), Inc. Constant current control circuit with multiple outputs for LED driver
US20140169037A1 (en) * 2011-04-28 2014-06-19 Saint-Gobain Glass France Module comprising light-emitting diodes and luminous glazing with such a diode-comprising module
US20120306387A1 (en) 2011-05-31 2012-12-06 Microsemi Corporation Led driver arrangement with multiple current mirrors
US9875697B2 (en) 2011-08-30 2018-01-23 Magnachip Semiconductor, Ltd. Parallel constant current LED driving units for driving a LED string and method of performing the same
US9660535B2 (en) 2011-11-11 2017-05-23 Microchip Technology Incorporated Method and system to dynamically position a switch mode power supply output voltage
US9084327B2 (en) * 2012-04-12 2015-07-14 Richtek Technology Corporation Driver circuit for improving utilization rate of LED device and related constant current regulator
US9257067B2 (en) 2013-05-13 2016-02-09 Shenzhen China Star Optoelectronics Technology Co., Ltd Light source driving circuit of light emitting semiconductor and backlight module
US20160255687A1 (en) 2013-11-25 2016-09-01 Koninklijke Philips N.V. A method of controlling a lighting arrangement, a lighting controller and a lighting system
US20150173143A1 (en) * 2013-12-13 2015-06-18 Delta Electronics (Shanghai) Co., Ltd Light driving circuit
US9443478B2 (en) 2014-08-06 2016-09-13 Samsung Display Co., Ltd. Light source device, driving method thereof and display device having the same
US9655184B2 (en) * 2015-03-31 2017-05-16 Varroc Lighting Systems S.R.O. Arrangement and method for controlling a plurality of light-emitting diodes which are connected in series
US10212770B2 (en) 2015-04-23 2019-02-19 Versitech Limited AC-DC single-inductor multiple-output LED drivers
US9930747B2 (en) * 2016-04-11 2018-03-27 Cooper Technologies Company Fail-safe LED system
US9717123B1 (en) 2016-10-17 2017-07-25 Integrated Silicon Solution, Inc. Audible noise reduction method for multiple LED channel systems
US9924574B1 (en) 2016-10-28 2018-03-20 Uledo Llc. Method and apparatus for controlling light output from a LED lamp
US20200077477A1 (en) * 2017-03-14 2020-03-05 Lumileds Llc Led lighting circuit
US20180338358A1 (en) 2017-05-17 2018-11-22 Eaton Intelligent Power Limited Led luminaire with constant current per-module control
US10334676B2 (en) 2017-05-17 2019-06-25 Eaton Intelligent Power Limited LED luminaire with constant current per-module control
US20180376555A1 (en) * 2017-06-27 2018-12-27 Wangs Alliance Corporation Methods and apparatus for controlling the current supplied to light emitting diodes
US20190069381A1 (en) 2017-08-23 2019-02-28 Eaton Intelligent Power Limited Time-Based Lighting Control

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220225484A1 (en) * 2019-05-17 2022-07-14 Signify Holding B.V. Shared power topology for led luminaires
US11930572B2 (en) * 2019-05-17 2024-03-12 Signify Holding B.V. Shared power topology for LED luminaires
US12108503B2 (en) 2022-12-20 2024-10-01 Electronic Theatre Controls, Inc. Independent lighting control
US12538406B2 (en) 2022-12-20 2026-01-27 Electronic Theatre Controls, Inc. Independent lighting control

Also Published As

Publication number Publication date
JP2022533175A (ja) 2022-07-21
WO2020234183A1 (en) 2020-11-26
EP3970453B1 (en) 2024-06-26
JP7503078B2 (ja) 2024-06-19
CN113841466B (zh) 2024-07-23
US11930572B2 (en) 2024-03-12
US20220225484A1 (en) 2022-07-14
CN113841466A (zh) 2021-12-24
US20200367330A1 (en) 2020-11-19
EP3970453A1 (en) 2022-03-23

Similar Documents

Publication Publication Date Title
US11930572B2 (en) Shared power topology for LED luminaires
US10327290B2 (en) Lighting circuit and vehicle lamp
US10797516B2 (en) Lighting system including a power backup device
EP2073605A1 (en) Lighting controller of lighting device for vehicle
US8294371B2 (en) LED traffic signal with synchronized power pulse circuit
US9096173B2 (en) Control circuit for a dual-function signaling or lighting device and corresponding control method
CN204119603U (zh) 点灯装置以及照明装置
CN104284476B (zh) 点灯装置及照明装置
JP2014191933A (ja) 標識灯装置
WO2016187845A1 (en) Solid state lighting driver circuit with ballast compatibility
US20210100079A1 (en) Led luminaire multiplexing with constant current driver
US20210345463A1 (en) System and method for repurposing 120vac wiring architecture to retrofitable low voltage dc power 2-wire led dimming
KR101753193B1 (ko) 병렬 연결된 led모듈의 pwm제어를 통한 led등기구의 전류 컨트롤방법
US9930747B2 (en) Fail-safe LED system
KR20160077718A (ko) 3상 교류전원용 led 구동회로, led 조명장치 및 이를 포함하는 led 조명 시스템
US9307610B2 (en) Low power bypass circuit for LED open circuit and reverse polarity protection
US10009973B1 (en) Redundant power for lighting system
KR102608623B1 (ko) 스포츠 조명 시스템
JP7443882B2 (ja) 点灯装置及び照明器具
FI20245092A1 (en) Led driver apparatus and led lighting arrangement
KR20140090748A (ko) Led램프용 보호회로
TW201914363A (zh) 使用高電壓驅動多個發光二極體的裝置

Legal Events

Date Code Title Description
AS Assignment

Owner name: EATON INTELLIGENT POWER LIMITED, IRELAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:VOLLMER, BENJAMIN DAVID;DOST, ISAAC P.;OWENS, WALTEN PETER;AND OTHERS;REEL/FRAME:049208/0152

Effective date: 20190516

FEPP Fee payment procedure

Free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

AS Assignment

Owner name: SIGNIFY HOLDING B.V., NETHERLANDS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:EATON INTELLIGENT POWER LIMITED;REEL/FRAME:052633/0158

Effective date: 20200302

STCF Information on status: patent grant

Free format text: PATENTED CASE

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 4